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Understanding 9/11Computational Fluid Dynamics Simulations Using FDA’s Idealized Medical Device Demonstrating the Importance of Model Validation
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Validation is the assessment of the accuracy of computational simulations by comparison
with experimental data. A well validated computational fluid dynamics model can be of
high importance when assessing the safety of medical devices. However, its validation
and verification must be conducted before the results can be considered credible. The U.S.
Food and Drug Administration has completed a computational inter-laboratory study that
showed relatively negative current state of numerical methods used for simulating fluid
flow in an idealized medical device, even by self-ascribed experts. Yet, the same numerical
methods are commonly used to simulate fluid flow in much more complex geometries,
especially when patient-specific geometries need to be used. The study presented here recreated
these results with larger number of participants and confirmed the need for proper
validation of the numerical methods used. Moreover, the results were analyzed with respect
to the use of grid refinement study by the participants.
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